\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*} fee(student) &=& 2^37492 \frac{x*y*e^x+e^y}/\sqrt{{263x - e^x}} \end{equation*}
\end{document}
